Self-assembled nanoparticles based on modified cationic dipeptides and DNA: novel systems for gene delivery

Area of Science:

• Biomaterials Science
• Gene Therapy
• Nanotechnology

Background:

• Achieving a balance between efficiency and safety in gene therapy vectors remains a challenge.
• Viral and polymeric vectors often face limitations in safety and efficiency.
• Peptide-based systems show promise but suffer from proteolysis instability.

Purpose of the Study:

• To investigate the gene delivery potential of nanoparticles synthesized from cationic dipeptides.
• To evaluate the efficacy and safety of these novel nanoparticles for gene therapy.

Main Methods:

• Synthesis of cationic dipeptides containing a non-protein amino acid residue.
• Formation and characterization of nanoparticles (Nps) using self-assembly, light scattering, and electron microscopy.
• Testing transfection efficiency in hepatocellular carcinoma (HuH 7) cells.

Main Results:

• Cationic dipeptide Nps successfully condensed plasmid DNA into nanostructures.
• Nps demonstrated non-cytotoxicity and protected DNA from enzymatic degradation.
• Successful delivery and gene expression (GFP) were observed in HuH 7 cells.

Conclusions:

• Cationic dipeptide Nps serve as effective DNA delivery vehicles without cytotoxicity.
• Their simple origin, ease of synthesis, enzymatic stability, and biocompatibility make them suitable for gene therapy development.